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Products
Portable water quality tester
Laboratory benchtop water quality analyzer
On-line water quality monitoring equipment
Reagent consumables
Application
Boiler water
Recirculating cooling water
Drinking water/tap water
Secondary drinking water supply plant
Farmland irrigation water
Sewage/waste water
Surface water(Rivers and Lakes, etc.)
Aquaculture water
pool water
News&Case
Company News
Industry information
Case
Services
After-sale
FAQ
Data download
About
Company Profile
Qualification Patents
History
Cooperative Clients
Contact
Contact
Message
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25
2024.01
What is the purpose of industrial boiler water supply test?
In China's industrial boiler is widely used in chemical industry, food, brewing, heating, paper making, printing and dyeing, rubber and other industries. So, what is the purpose of these industrial boiler water supply testing?
2024.01.25
30
2025.12
How to Test for Available Chlorine? Accurate Methods & Best Portable Tester
In this article, we explain what available chlorine is, review the most common testing methods, and introduce a reliable portable solution—the ERUN-SP7 portable multi-parameter water quality tester—for fast and accurate on-site chlorine measurement.
2025.12.30
29
2025.12
Why Is Residual Chlorine Important in Water Quality Monitoring?
In this article, we will explain why residual chlorine is important, how it affects water quality, where it needs to be monitored, and how advanced testing instruments like the ERUN-ST7 laboratory bench-top multi-parameter water quality analyzer help professionals achieve accurate and reliable results.
2025.12.29
29
2025.12
What Does Phenolphthalein Alkalinity Measure? A Practical Guide for Water Testing
In this article, we explain what phenolphthalein alkalinity measures, how it differs from other alkalinity indicators, where it is applied, and how modern laboratory instruments like the ERUN-ST7 multi-parameter water quality tester help achieve precise and repeatable measurements.
2025.12.29
26
2025.12
What happens if alkalinity is too low? Test & Fix
This article explains the chemistry, real-world impacts, how to test (including the ERUN‑ST7), how to raise alkalinity safely, and how to prevent repeat problems.
2025.12.26
26
2025.12
How Does Total Alkalinity Affect Water? Test with ERUN-ST7
Total alkalinity controls water's buffering capacity — how well it resists pH change. That single property affects taste, corrosion vs. scaling, disinfection, and aquatic health. This article explains how total alkalinity affects water, how to measure and adjust it, and how the ERUN‑ST7 water quality analyzer helps you diagnose and manage alkalinity-related problems.
2025.12.26
25
2025.12
What Affects Dissolved Oxygen Levels in Water? A Practical Guide for Accurate Testing
In this article, we will explain the key factors that influence dissolved oxygen, why DO levels matter, and how to measure them accurately using professional equipment such as the ERUN-ST7 desktop multi-parameter water quality analyzer from Erun.
2025.12.25
24
2025.12
Is a Water Test Required on Boilers? A Complete Guide for Boiler Water Quality Control
In this article, we explain why boiler water testing is essential, what parameters should be monitored, and how portable water quality analyzers like ERUN-SP7 can simplify on-site testing.
2025.12.24
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